| 摘要 |
PROBLEM TO BE SOLVED: To provide a data writing device, even when an unauthorized act, such as, a cable being connected to an input part to which a write-in signal is input or that a signal line connected to the input part is clamped has been performed, for preventing data recorded in a magnetic card from been acquired in an unauthorized manner.SOLUTION: A magnetic head 4 includes a reading-writing part 41 that writes data into a magnetic card; an input terminal 43b, to which a writing signal to be supplied to the reading-writing part 41 is input, and a switching circuit 42c that switches whether to electrically connect the reading-writing part 41 to the input terminal 43b. |
